Home / 85,286.20-127,929.30-40,890.10

Finding the Fourth Proportional to 85,286.20, 127,929.30 and 40,890.10

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Solution

The fourth proportional to 85,286.20, 127,929.30 and 40,890.10 is: 61,335.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,286.20 : 127,929.30 = 40,890.10 : x
  2. Step 2: Convert to fraction form
    85,286.20/127,929.30 = 40,890.10/x
  3. Step 3: Cross multiply
    85,286.20x = 127,929.30 × 40,890.10
  4. Step 4: Simplify right side
    85,286.20x = 5,231,041,869.93
  5. Step 5: Solve for x
    x = 5,231,041,869.93/85,286.20
  6. Step 6: Final answer
    x = 61,335.15

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.